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Questions tagged [gravity]

Gravity is an attractive force that affects and is affected by all mass and - in general relativity - energy, pressure, and stress. Prefer newtonian-gravity or general-relativity if sensible.

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Summary: This paper proposes "Interaction Theory," a framework that attempts to replace continuous field theories (Maxwell’s equations and General Relativity) with a microscopic substrate of ...
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I have two possible scenarios and I wonder whether the electron and arrive before the photon in either of them. Scenario 1: There is an emitter at A, and a reciever at B. Let the midpooint of AB be C. ...
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Inside of a shell space time is flat, but you do get time dilation relative to distant observers. As the shell gets smaller, time dilation gets stronger. So does and observer inside of a collapsing ...
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We know universe is expanding and space is also expanding. When why we dont feel the space around us and ourself expanding or stretching .even an big object Does it negligible?
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Did gravity exist at our universes' $t_0$ (initial singularity)? Or, did gravity only exist after Mass was established with the creation of the Higgs Boson? What period of time was there between $t_0$ ...
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OKay, I know hollywood just be hollywooding science fiction movies. However, to my understanding the movie Interstellar had a physicist Kip Thorne who informed them on some aspects in astrophysics. ...
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